Affiliation: | 1. Division of Endoscopy, Hokkaido University Hospital, Sapporo, Hokkaido, Japan;2. Department of Gastroenterology, Hokkaido University Graduate School of Medicine, Sapporo, Hokkaido, Japan;3. Division of Pathology, Hokkaido University Hospital, Sapporo, Hokkaido, Japan;4. Division of Gastroenterology, KKR Sapporo Medical Center, Sapporo, Hokkaido, Japan;5. Division of Pathology, KKR Sapporo Medical Center, Sapporo, Hokkaido, Japan;6. Center of Gastroenterology, Otaru Ekisaikai Hospital, Otaru, Hokkaido, Japan;g Takahiro Fujii Clinic, Tokyo, Japan;h Department of Cancer Preventive Medicine, Hokkaido University Graduate School of Medicine, Sapporo, Hokkaido, Japan |